File guide and handle



April 9, 1929. R. A. HOUSE FILE GUIDE AND HANDLE Filed June 29, 1927 ATTORNE Y.

Patented Apr. 9, 1929.

RANDOLPH A. HOUSE, OF MIDDLE HADDAM, CONNECTICUT.

FILE GUIDE AND HANDLE.

Application filed June 29,

This invention relates to new and useful improvements in filing devices,and partic ularly to devices for filing saws.

In filing the teeth of most hand saws, a triangular file is used, butthe file must beadjusted axially to produce the desired vertical angleon the side of the tooth, and at the same time the file must be swunginto an angular position, within a horizontal plane, to produce theproper angle of cut on the side of the tooth, transversely of the saw.This is generally accomplished by holding one end of the file in onehand, while holding the other end of the file in the other hand. Usuallythe end of the file,

next the operator, is provided with a handle, but the other end of thefile is held in the bare hand, with the result that, when a great numberof saws are being sharpened, the bare hand becomes sore. Also, it isdillicult to hold the file at the proper angles, to produce the desiredand required cuts on the teeth of the saw, and especially to obtain thesame angles on all of the teeth. This is due to the fact that the tileturns both axially and horizontally, in the hand oi? the user, so thatall of the teeth are not liled to the same angles.

It is the principal object of the present invention to provide a devicewhich serves as a proper guide to the operator to accomplish therequired angles while filing the teeth, while at the same time thedevice serves as a handle for the end of the file remote from the user.

Other objects and advantages will be apparent from the followingdescription when taken in connection with the accompanying drawing.

In the drawing:

Figure 1 is a top plan view of a file guide and handle, made inaccordance with the present invention.

Figure 2 is a side elevation of the same.

Figure 3 is an end view of the same.

l igure e is an enlarged vertical sectional detail view on the line allof Figure 1.

Referring particularly to the accompanying drawing, 10 represents asegmental plate having its smaller end bent to extend at right angles tothe plane of the plate, as at 10. In the smaller end of the plate,adjacent the angularly turned portion, there is formed an opening 11,and formed in the upper face of the body of the plate, in radiatingrelation to said opening, are lines 12,

1927. Serial No. 202,331.

numbered in opposite directions from the central one. Disposed throughthe opening 11 is the threaded stem of the post 13, a spring washer letbeing engaged on the stem, beneath the plate, and a pair of nuts 15engaged on the stem against said washer. Formed transversely through thepost is an opening 16, in which is engaged one end of an obtuse angulararm 17, a set screw 18 being engaged downwardly through the upper end ofthe post for binding engagement with the arm 17. Formed integrally withthe post, and arranged to traverse the before-mentioned radiating lines12, is a pointer 13. In the other end of the obtuse arm 17, which isextended downwardly be low the plane of the plate 10, there is formed alongitudinal kerf 19, and in the side walls of the kerf, at the outerend thereof, are formed the semicircular recesses 20, within which isfrictionally held the intermediate portion of a transverse guide rod 21.It will be noted that the upper side of the post engaging end of the arm17 is flat, as at 22, whereby when the screw engages therewith, said armis held against rotation in the opening 16, of the post 13.

In a downwardly extending end 10, of the plate 10, there is formed anopening 23, and fixed in the opening, at one end, is a cylindrical block24, the other end extending beneath the horizontal portion of the plate.Rotatably engaged in the first end of the block 24 is the reduced end ofa cylindrical block 25, such end being arranged to be held in differentrotary positions by the set screw 26, carried by the block 24. Formedlongitudinally through the block 25- is an inclined and triangular bore27, in which is received one end of the file 28, a set screw 29 beingcarried by the block 25 for holding the file within said opening. On thevertical face of the portion 10 of the plate 10, just above the block25, are lines 30, radiating from the center of the opening 23, andformed integrally with the upper side of the block 25 is an indicatinghand or pointer 31, arranged to traverse the lines 30, as the block isrotated within the opening 23. This movement of the block 25 serves toadjust the file at the proper position axially, to produce the desiredangle with respect to the vertical plane of a tooth of a saw, while theadjustment of the post 13, rotatably, provides for the horizontalswinging adjustment of the file, within a an. mu

the plate 10 With the left hand, While plac' ing the angle of the filebetween two adjacent teeth of the saw. The operator then moves the fileuntil the guide bar or red 21 is close to the near side face of thesaw,and

in parallel relation thereto, when observed by the operator both fromabove, as Well as from the side of the saw. He then draws the filetoward him seein that the bar or rod 21 isinaintained in its properparallel relation to the saw. The file is then reciprocated by theoperator until the saw tooth tace ias been redueed to the proper angles,both vertically and transversely of the saw. When one tooth has beenproperly filed,

the file, together with theinechanisni carried by its reinote end, islifted, and the file edge transferred into the space between the next adacent pair of teeth, and the filing operation repeated, as abovedescribed.

Each time that the operator reciprocates the file across the face of thetooth, he must observe that the rod 21 is maintained iii parallelrelation to the cutting edge of the saw, both when observed above and atthe SlClGOf the saw. Observance of the parall-e1 position of the guiderod will maintain the tile in its proper position to accurately file thesaw teeth at the required angles.

What is claimed is: 7V V 1. A' file guide and supportcomprising an angleplate having. a vertical leg and a horizontal leg, av rotatahlyadjustable file end supporting member mounted in the vertical leg, averti'cle rotatable post mounted in the horizontal leg an arm slidablyad justable through said pest, and a transverse sight guide carriedbythe outer end of the said arin.

2. A file guide and support comprising an angle platehaving a. verticalleg and a horizontal leg, a file end receiving and clamping tuberotatably adjustable in the vertical leg and having an indicating handtraversing a dial on said leg, a vertical post rotatably adjustable inthe horizontal leg of the plate adjacent the said dial andhaving atransverse opening therethrough, said post having an indicating handthereon for traversing a dial on the said horizontal log, a bent arinslidably adjustable through the opening of the post, anda transverse barcarried by the outer end or" the arm and overlying the adjacent end of afile supported in said tube. I

In testimony whereof, I atlix my signature.

RANDOLPH A. HOUSE.

